发明名称 |
OPTICAL RECORDING MEDIUM AND OPTICAL RECORDING MEDIUM RECORDING DEVICE |
摘要 |
<p>An optical recording medium such as DVD has a data recording area (103) in which data can be rewritten and a write-once area (104) in which data can be written only once and not be erased. A medium specific ID (105) which is specific to an optical recording medium is recorded in the write-once area (104). In the data recording area (103), a reflectance ratio of a part where the data is recorded is different from a reflectance ratio in a part where the data is not recorded. A reflectance ratio of a recording pit formed in the write-once area (104) is higher than the higher one of the reflectance ratios in the part where the data is recorded and in the part where the data is not recorded in the data recording area (103). Data recoding in the write-once area (104) is performed by irradiating to the write-once area (104) a laser beam with heat amount of three to 25 times heat amount necessary for recording rewritable data in the data recording area (103). <IMAGE></p> |
申请公布号 |
EP1551009(A1) |
申请公布日期 |
2005.07.06 |
申请号 |
EP20030748563 |
申请日期 |
2003.09.24 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
HINO, YASUMORI;AKIYAMA, TETSUYA;YAMADA, NOBORU;MORIYA, MITSUROU |
分类号 |
G11B7/007;G11B7/0045;G11B7/24;G11B7/30;G11B20/00;G11B20/10;(IPC1-7):G11B7/004 |
主分类号 |
G11B7/007 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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